Question

ALL QUESTIONS A1: 20 micron is equal to: (a) 20 x 10 nm (b) 20 x 109 nm (c) 200 nm (d 20000 nm 20%10 A2: 1 mm is equal to: (a) 10 nm () 106 nm (c) 107 nm (d) 107 nm IXIO-3 IX/3 = (2 1o'xres A3: One of the primary reasons that crystal materials are used to construct micro- and nano-sized devices is that crystals (a) are relatively easy to makeyY (b) have a long range order (c) can be etched easily (d) are typically very strongy A4: For microsystems fabrication, the etch process normally follows which of the following process steps? (a) Deposition Photolithography (b) (c) (d) Oxidation Evaporation A5: Which of the following BEST explains the primary difference between wet etch and dry etch processes? (a) Wet etch uses a liquid etchant. Dry etch uses a gaseous etchant. (b) Wet etch is a chemical etch. Dry etch is a physical etch (c) Wet etch is a chemical reaction. Dry etch is a physical reaction (d) Wet etch yields isotropic profiles. Dry etch yiclds anisotropic profiles. A6: The sensing transducers of a Wheatstone bridge circuit are made from a piezoresistive material that changes in resistance when its length, widh, and/or thickness change. What is this type of transducer called? (a) Strain gauge (b) Thermocouple (c) Thermister (d) Accelerometer

please solve the objective questions. thanks

Answer 1

A1) 20 micron =
20X10-4
meter =
20 x 10-6 20X10-9nm = 20X10 nm
= 20000 nm

A2) 1mm =

1x 10° nm

A3) c) Can be etched Easily

A4) b) Photolithography

A5) b) Wet Etch is a chemical etch. Dry Etch is a physical etch.

A6) Answer is Resistive Transducer, and the option is not given

A7) a) Cartesian Coordinate

A8) c) Repeatability

A9) e) Wafer

A10) e) Ultra-Violet Light

A11) c) STL - Standard Tessellation Language

A12) b) Business Function

A13) c) Shot Peening

A14) b) Improvement in product quality

A15) a)14mm. The total height is (44+5)mm = 49mm, with datum of height 35mm the tool length compensation should be 49-35= 14mm

A16) a) Relay Switch

A17) d) Spraying

A18) c) Reduce Etch Resistance

A19) d) 3.23 million

The Cash Flow for the Project =

- (-2) 1+ 0.15 「1+10.15}? (1+0.151 +0.15} 一 = {0 195132 4063

The Current value of the Assets =

F2F6E SOETE (SIO + 1) 9

So the present worth of the project = 3.430519474 - 0.1954324063 = 3.235087067

A20) c) 4 Years

Initial Investment = 50 million

Cash Flow due to Investment = (15 + 20 - 12 - 8) million = 15 million

Payback Period = $\frac{50}{15}$ = 3.33 years